These video segments from PBS Series, The Human Spark, explore the evolution of life on Earth, from the earliest single-celled organism to modern Homo sapiens. They may be used on their own or with the lesson plan, Life as We Know It.

In a three-part series originally brodcast on PBS in January 2010, Alan Alda takes this question personally, visiting with dozens of scientists on three continents -- even undergoing an examination of his own brain.» Learn More

Major funding for The Human Spark is provided by the National Science Foundation, and by the Alfred P. Sloan Foundation. Additional funding is provided by the John Templeton Foundation, the Cheryl and Philip Milstein Family, and The Winston Foundation.